Based on the given information, the normal force acting on the student is 50.0 N.
How to find the normal force acting on the student
The normal force acting on the student can be calculated using Newton's third law, which states that every action has an equal and opposite reaction.
When the student applies a downward force of 50.0 N on the table, according to Newton's third law, the table exerts an equal and opposite force upwards on the student.
Hence, the normal force exerted by the floor on the student is also 50.0 N.
This means that the normal force provided by the floor balances the downward force exerted by the student, resulting in no net vertical acceleration (since the student is at rest).